谈遥感影像在城乡规划工作中的应用

以遥感影像在邯郸市城乡规划工作中的应用为例,分析介绍了遥感影像在城乡规划设计、管理等方面的应用,指出遥感影像是城乡规划工作的重要资料,在城乡规划工作中将发挥更大作用。     

Study on electrokinetic remediation of cadmium contaminated soils

Kaolinite from a lead-zinc mining district,which was spiked with cadmium,has been treated by electrokinetics to investigate effects of treatment time and applied voltage gradient.The results showed that the increased test duration had induced a higher removal rate of cadmium.Being treated for 7 days,cadmium was removed from kaolinite dramatically.It was also found that higher removal rate happened when a higher voltage gradient was applied and cadmium accumulated near the cathode because pH increased.Increase of pH near the cathode caused accumulation of cadmium.Moreover,it was observed that cation exchange membrane which was placed between kaolinite and cathode could make pH lower than the initial value and avoid the higher pH near the cathode.As a result,the high concentration accumulation of cadmium near the cathode was avoided.     

论高填方区深基坑边坡支护设计与施工

结合工程实例,对土方开挖及边坡支护施工相关问题进行了论述,为保证土方开挖及边坡支护施工的安全性,对边坡支护设计方案选用、土方开挖及边坡支护施工方案的编制相关内容进行了探讨,以期对今后类似施工具有一定帮助。     

Coupled macro-micro modeling for prediction of grain structure of Al alloy

A 3D stochastic modeling was presented to simulate the dendritic grains during solidification process of aluminum alloy. Shape functions were proposed in 2D and 3D to describe equiaxed dendritic shape. A growth model was presented to describe the growth of a nucleated grain and the capturing of the neighboring cells. On growing,each grain continues to capture the nearest neighboring cells to form the final grain shape. If a neighboring cell has been captured by other grains, the growth along this direction stops, which can reflect the grains impingement phenomenon occurring in solidification process. 2D and 3D calculations were performed to simulate the evolution of equiaxed dendritic grains. In order to verify the modeling results, step-shaped sample castings were cast in sand mold. The microstructure in various positions of the sample was observed. In addition the quantitative metallographic analysis also has been done to evaluate the grain size. Experimental and numerical results agree well.     

滇黔北地区五峰组—龙马溪组页岩气富集条件及有利区预测

滇黔北地区上奥陶统五峰组—下志留统龙马溪组海相页岩具有较好的页岩气资源前景,但目前对于其复杂地质条件下的页岩气成藏富集规律仍不明确。为此,基于最新的钻井资料,结合野外露头剖面观察和样品测试结果,对该区五峰组—龙马溪组的沉积环境,优质页岩的分布与埋深、有机地球化学指标、储集性参数、含气性等页岩气富集条件进行了系统分析,预测了优质页岩有利区带并评价其勘探潜力。结果表明:(1)该区五峰组—龙马溪组为浅水陆棚—深水陆棚沉积,沉积环境控制了优质页岩的厚度与分布,地史沉积格局和后期构造运动改造控制了底界埋深——底界埋深介于0~4 000 m,优质页岩沉积厚度介于0~60 m;(2)该区优质页岩有机碳含量高(1.0%~4.0%),热演化程度高(过成熟),有机质类型稳定(腐泥型—偏腐泥混合型),生烃强度高(1.0×10~8~4.0×10~8m~3/km~2),生烃潜力较大;(3)优质页岩脆性矿物含量较高,破裂潜力较好,储层储集空间类型多、微裂缝发育;(4)区内局部保存条件较好,具备页岩气成藏的良好地质条件。结论认为:盐津西、筠连南、威信—叙永—古蔺、习水东等4个区域五峰组—龙马溪组页岩气成藏条件优越,具备良好的页岩气勘探潜力,为该区最有利的页岩气勘探区带。     

上扬子区龙王庙期碳酸盐岩台地模式及油气勘探

以碳酸盐岩沉积学为基础,利用钻井岩心、野外露头和测井资料,对上扬子龙王庙组的碳酸盐岩台地模式及其油气勘探影响因素进行研究。研究认为：龙王庙中、晚期,上扬子碳酸盐岩台地初具镶边台地模式特征,局限台地相带宽广,开阔台地相带狭窄,可见台地边缘以及台缘斜坡带沉积。龙王庙组台内滩沉积体易形成溶蚀孔隙储层,咸化澙湖相膏盐岩能作为区域性优质盖层,与台内滩相和咸化澙湖相相关的圈闭都具有良好的油气勘探潜力。     

一种高分辨率接触式电容测微装置

目前,随着精密机械和精细技术的发展,对微小位移的测量已进入毫微米领域,精度和分辨率要求越来越高,并且希望使用环境不太苛刻、价格低廉、操作简便。电容测微在这方面很有潜力,以往在实验室条件下,有的分辨率达到0.1(?),有的精度在100mm测量范围达0.04μm,有的稳定性方面达到每天漂移10~(-9)mm,只是由于一些弱点,影响其广泛应用。近年来,由于一些新技术、新电路的出现,电容测微又得到迅速发展,相比之下,我国在这     

凝固模拟软件在大型铸钢件上的应用研究

结合工厂实际生产条件，应用所开发的铸造充型凝固过程数值模拟商品化软件FT-STAR预测大型铸钢件的缩孔缩松缺陷，将计算结果与铸件X-射线探伤报告进行对比分析，证明计算结果能较好地反映实际情况，从而在原工艺改进和新产品试制方面为工厂提供了技术支持，为优化铸钢件铸造工艺提供了科学依据，并为工厂取得了良好的经济效益。     

川东南清虚洞组储层测井响应特征及控制因素

川东南地区清虚洞组地层在测井上表现为声波时差、补偿中子和双侧向均与前人归纳总结的四川盆地海相碳酸盐岩储层的测井响应特征一致,但均未获得工业气流。根据岩屑薄片及分析测试等资料,确定了砂屑白云岩、泥-粉晶白云岩为储层主要岩石类型。通过测井曲线特征和统计学方法分析得出:白云岩和灰岩地层中大量的粘土矿物、沥青、有机质、黄铁矿和裂缝是导致测井曲线呈优质储层响应特征的主要因素。     

超长混凝土结构裂缝控制关键技术在工程中的应用研究

超长混凝土结构裂缝控制是一项系统工程,涉及材料、结构设计和施工控制三个层次。采用试验研究、现场实测和数值模拟相结合的方法,系统研究超长混凝土结构裂缝控制中的关键技术,并将研究成果应用到上海烟草集团浦东科技创新园建设项目中,取得了良好的裂缝控制效果,可为同类工程应用提供参考和依据。